drop gzip support when compressing base.tar file. Always use xz.

bin/fai-make-nfsroot

@@ -156,11 +156,6 @@ deldir=$NFSROOT
 ROOTCMD="chroot $NFSROOT"
 export DEBIAN_FRONTEND=noninteractive
 
-usexz=0
-if [ -x "$(which xz)" ]; then
-    usexz=1
-fi
-
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 adjust_nfsroot() {
 
@@ -295,17 +290,9 @@ create_base() {
     call_debootstrap $FAI_DEBOOTSTRAP
     $ROOTCMD apt-get clean
     rm -f $NFSROOT/etc/resolv.conf $NFSROOT/etc/hostname $NFSROOT/etc/udev/rules.d/70-persistent-net.rules
-    if [ $usexz -eq 0 ]; then
-        echo "Creating base.tar.gz"
-    else
-        echo "Creating base.tar.xz"
-    fi
+    echo "Creating base.tar.xz"
     tar --one-file-system -C $NFSROOT -cf $NFSROOT/var/tmp/base.tar --exclude var/tmp/base.tar --exclude 'var/lib/apt/lists/*_*' .
-    if [ $usexz -eq 1 ]; then
-        nice xz -q $NFSROOT/var/tmp/base.tar &
-    else
-        nice gzip $NFSROOT/var/tmp/base.tar &
-    fi
+    nice xz -q $NFSROOT/var/tmp/base.tar &
 }
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 extract_base() {

debian/control

@@ -39,7 +39,7 @@ Description: Documentation for FAI
 
 Package: fai-server
 Architecture: all
-Depends: fai-client, debootstrap, ${misc:Depends}
+Depends: fai-client, debootstrap, xz-utils, ${misc:Depends}
 Recommends: nfs-kernel-server, isc-dhcp-server, tftpd-hpa | atftpd, openssh-server, openssh-client, openbsd-inetd | inet-superserver, libproc-daemon-perl
 Suggests: debmirror, reprepro, xorriso, binutils, grub, aptitude, perl-tk
 Description: Fully Automatic Installation server package